Dynamics in cold atoms state engineering and quenches with long-range interactions (Prof. A. Daley)

  • Datum: 27.05.2015
  • Uhrzeit: 15:00 - 17:00
  • Vortragende(r): Professor Dr. Andrew Dayley, University of Strathclyde, Computational Nonlinear & Quantum Optics group
  • Raum: Herbert Walther Lecture Hall
  • Gastgeber: MPQ
In recent years, systems of ultracold atoms in optical lattices have opened new opportunities for exploring time-dependent many-body dynamics.

In addition to coherent phenomena, it has become possible to engineer open quantum systems, drawing new connections between many-body physics and concepts from quantum optics. This is both intrinsically interesting, and also an important tool for realising lower temperatures and engineering many-body quantum states. I will discuss some of our recent theoretical work in these directions. In terms of new tools, I will discuss schemes for adiabatic state preparation of magnetically ordered states in two-component bosons, especially analysing how these can be affected by dissipation and classical noise. In certain regimes, adiabatic processes can be particularly robust against typical noise sources, and in some cases classical noise can be engineered to enhance adiabaticity. I will also discuss quench dynamics for spin models engineered with trapped ions, where it is possible to vary the range of the interactions. This leads to interesting and sometimes counterintuitive phenomena in correlation spreading and the growth of entanglement when the interactions are long-range.

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